Insulator



F. M. AMOS.

INSULATOR.

APPLICATION FILED APR. 9. 1920.

1,376,307 Patented Apr. 26, 19,21.

tween them'when the shipped sill use or employment of latter type and has production of' an insulator wherein but three UNITED STATES PiTENT OFFICE FRANK M. AMOS, OF W'HEELING, WEST ViRGIN'IA, ASSIGNOR TO WHEELING TliLE COMPANY, OF WHEELING, WEST VIRGINIA, A COBPORATiQN OF WEST VIR- GINLA.

INSULATOB.

Specification of Letters Yatent.

Patented Apr. 26, 1921.

Application filed April 9, 1920. Serial No. 372,549.

.1" all whom it may concern:

of which the following is a specification.

This invention pertains to insulators, and has reference more particularly to that type wherein a base and cap piece are employed to hold and clamp one or more wires beparts are secured togather in bindingor clamping relation to each other and to a support. Such base and cap pieces are commonly made of porcelain and for many years past said elements when from the factory were entirely disassociated and it was necessary for the workman to assemble them and secure them in. place'by passing a nail or screw through the elements and into the member to which the insulator was to be attached. Of late years, however, several expedients have been proposed whereby the elements of the insulator could be assembled at the factory, the arrangements being such .as to allow a ative movement of the cap and base section so that the wire or wires could be readily placed prior to the final securing act, while at the same time complete separation of the elements under ordinary usage and handling was precluded.

'Thepresent invention has-to do with the for its main object the elements are present, to-w1t,-the base, the cap and the securing nail, the formation of the parts being such that a binding action between the nail and base will be automaticallyeffected in. the act of assembling the elements at the factory, and this without any additional elements such as spring washers or sleeves, or the after treatment or deformation of the nail to prevent the base being withdrawn therefrom. Moreover the necessary displacement or latitude of movement of the cap with reference to the base to admit of the positioning of the wire PIIOT tO final placement of the insulator 1s provided for under the present arrangement.

The invention is illustrated in the annexed drawings wherein:

Figure 1 is a longitudinal sectional wow of the insulator;

Amos, a I

reference the groove Fig. 2 a transverse section on the line II'- II of Fig. 1; I

Fig. 3 a similar View on the line 111 411 of Fig. 1;

Fig. l a longitudinal sectional View of the base the section being the same as that in Fi z 1 but with the nail removed; and

1g. 5 a face view of the lower. end of the base.

In the drawings 1 denotes the base and. 2

the cap, the opposing faces whereof are pro .vided with suitable w1re engaging and clamping elements of any approved or suitable type; the construction shown being similar to that set forth andclaimed in Letters Patent No. 1,311,483, datedJuly 29, 1919. The cap and base are provided with alining bores to roceive the fastening nail 3 and a yielding washer l, preferably underlies the nail head and bears against the outer face of the cap. The base 1 instead of be--, ing hollowed. out at the bottom thereof, as is usually done, is, in the present instance hollowed out on one side of the center only, as at 5, leaving a thickened wall or body '5 opposite such recess. The hero 7 in the up per portion of the body 1 is axially disposed therein and alines with the bore in the cap. Said bore '7 at its lower end merges into. a groove or channel 8 formed in the adjacent face of the wall 6, said channel being inclined to the axis of bore '7 and inclining toward recess 5, as will be clearly seen upon to Figs. 1, i and 5. Furthermore,

shallower toward its outer or lower end.

.hus in making a factory assembly of the elements the nail 3 passes freely through cap 2 and into the bore 7 but when the nail contacts the groove 8 it is deflected 0r bent to a slight extent, the nail being forced through the bore 8 and'past and in contact with the deflecting groove until it assumes the position with reference to the base indicated in Fig. 1. This arrangement establishes such a direct frictional engagement between the nail and groove that withdrawal of the nail is precluded except upon the application of' considerable force and securely binds the base and nail together while at the sametime allowing the cap 2 to be moved freely of the nail toward and from the base.

While the deflection and uns eetenupon the upper portion cient to insure retention of the parts in their assembled condition, the deflection and 116- tion are not sufiicient to prevent the ready placement of the-insulator in its final posi tion and the driving of the nail home to bring the cap into binding relation to the wire or wires placed in the grooves in'the outer face of. the base.

It will thus be seen that l have produced nail to prevent its withdrawal or separation from the base member after it is passed through. thesame.

portion or the body of the base, precludes breakage of the bodyas the nail is forced through the base and deflected by the wall or channel formed therein.

What is claimed is;

1, In an insulator, the combination of a cap piece; a base said base and cap having alining bores and said base also having an inclined face; a nail, said nail when passed through said bores contacting theinclined face formed upon the base and making trictional contact therewith whereby the nail and base are normally held agalnst separation.

2. In an insulator, the co oination of a cap piece; a base, said base and cap having alining bores, and said base having a groove formed in the innerwall thereof, said groove lying in a plane inclined with rczerence to the bore in the base; and a nail, said nail when passed. through the bores contacting the wall otthe groove and being deflected thereby whereby the nail and base willbe held against separation through friction established between the nail and base while the cap may be moved on the nail toward and from the base for the placement of the wire to be clamped.

3. In an insulator, the combination of a cap piece having a bore extending there through; a base piece having a recess formed in the bottom thereof and an oppositely disposed thickened wall, the upper portion of the base having a bore therein andthefbase likewise having an inclined groove formed in the inner exposed face of said thickened wall, said groove at, its inner end alining with the adjacent portion of the wall oi the bore in the base piece; and a nail passing tact with the groove as it is to tact The fact that the wall. "6 is thick and in effect forms an integral sulator base having a recess formed in the F i araeoa loosely through the bore in the ca bore in the base and making? 'ctiona QCQC'LSIZ o with the all thereof whereby will be held against separation while e allowing relative movement of the cap on the nail towardand from he base.

4.. In an insulator, the combination of a, cap having abore; a'bas'e piece having a re cess formed in the lower portion of the body thereof with one wall of the recess lying in. a. plane in substantial coincidence with the axis of the body, said base' having a belieformed therein and a groove in the wall aforesaid as extension of the bore said groove inclining at its outer end toward the longitudinal axis of the bore; and a nail passing through the bores and making frictional contact with the groove.

5. In an insulator, the combination of a cap having a bore; a base piece having; a recess formed in the lower portion of the body said base piece having a bore in the upper part thereof and'a taperii 'oove" termed 1n the base as an extensi bore; and a nail passing through t e, bores aforesaid and makinga frictional balding contact with the groove,

6. In an insulator, the coin ination a cap having a bore; a base piece a recess formed in the lower portion of the body, said base piece having-a bore the upper part thereof and tapering: inclin d groove formed in i or the bore; and a nai v bores aforesaid and making binding contact with the greet 7. an ins ulaton the combinati cap piece base piece; and anail and cap being provided with alininn to receive the nail, and said base b wise provided with means formed-i curac therewith and located beyond the bore frictionally engage the nail and to thereby hold the nail and base against seoaration.

8. .thS anew article ol inanutactr-re an inoi a base bores bottom thereof to one site of the center the base, one wall of the recess standing substantial vertical alinement with the a. v of the base, said base having an axial bo formed therein and an inclined. groove i, the wall aforesairh said. groove formin extension of the bore and tperingr toward its outer end.

ln testimony whereof I have sigma-21d my name to this specification.

l? R A h M Ali Ede. 

